Boiler



(No Model.)

J. DEVINE.

BOILBR.

No. 415,768. Patented Nov. 26,1889.

N; PETERS. Pham-ummm wmhingxm D. c.

y UNITED STATES- PATENT OFFICE.

JOI-1N DEVINE, OF HUDSON, NEV YORK.

BOILER.

SPECIFICATION forming pm of Letters Patent No. 415,768, dated November2e, 1889. Application filed October 2, 1889. Serial No. 325,755. (Nomodel.)

To all whom it may concern.'

Be it known that I, JOHN DEVINE, of Hudson, Columbia county, New York,have invented an Improved Boiler', of which the following is aspecification. i

This invention relates to a boiler of novel construction designed forheating buildings.

It consists in the various features of improvement more fully pointedoutin the claim.

In the accompanying drawings, Figure lis a vertical longitudinal centralsection, partly in side view, of my improved boiler; Fig. 2, ahorizontal section on line cc Fig. l.

The letter a represents a fire-chamber of double truncated conical form,as shown. It is closed on top by a cover b and provided at the bottomwith the grate c. The tire-chamber a is surrounded by a shell d, betweenwhich and the walls of the re-charnber there is fbi-med a water-space.Within the fire- `chamber there is placed a coil of pipe e, thatcommunicates at both ends with the waterspace, as shown. Around theshell CZ is placed a jacket f, connected to the lire-chamber by means ofa series of radial pipes g, traversing the water-space. The products ofcombustion travel from the lire-chamber through the pipes g and enterthe jacket f, from whence they escape into the stack h. This stack opensinto the bottom of the jacket at the rear side of the boiler. It will beseen that byl the above construction the water is heated from bothsides, as well as by the radial pipes. The body of water within the coilc receives direct intense heat from the fire-chamber, and thus aconstant circulation is produced. The coil c serves also as a funnel,through which the coal fed in at the opening b falls upon the grate. f i

Vhat I claim is- The combination of a lire-chamber having a doubletruncated conical form and a top coalfeed b, with an inclosed coil e, aWater-chamber surrounding the fire-chamber and connected to the coil, ahot-air chamber around the water-chamber, and with a series of radiallaterally-extendin g tubes passing th rough the water-chamber andadapted to convey the products of combustion, substantially asspecitied.

JOI-IN DEVINE.

Witnesses:

JOHN DoYLE, PHILIP A. CooNEY.

